fixed issue with POWERLEVEL9K_PUBLIC_IP_NONE being empty for real

powerlevel9k.zsh-theme

@@ -429,7 +429,7 @@ prompt_battery() {
 prompt_public_ip() {
   # set default values for segment
   set_default POWERLEVEL9K_PUBLIC_IP_TIMOUT "300"
-  set_default POWERLEVEL9K_PUBLIC_IP_NONE ""
+  set_default POWERLEVEL9K_PUBLIC_IP_NONE "none"
   set_default POWERLEVEL9K_PUBLIC_IP_FILE "/tmp/p9k_public_ip"
   set_default POWERLEVEL9K_PUBLIC_IP_HOST "http://ident.me"
 
@@ -441,7 +441,7 @@ prompt_public_ip() {
     timediff=$(($(date +%s) - $(date -r $POWERLEVEL9K_PUBLIC_IP_FILE +%s)))
     [[ $timediff -gt $POWERLEVEL9K_PUBLIC_IP_TIMOUT ]] && refresh_ip=true
     # If tmp file is empty get a fresh IP
-    [[ -z $(cat $POWERLEVEL9K_PUBLIC_IP_FILE) || $(cat $POWERLEVEL9K_PUBLIC_IP_FILE) =~ '$POWERLEVEL9K_PUBLIC_IP_NONE' ]] && refresh_ip=true
+    [[ -z $(cat $POWERLEVEL9K_PUBLIC_IP_FILE) || $(cat $POWERLEVEL9K_PUBLIC_IP_FILE) =~ "$POWERLEVEL9K_PUBLIC_IP_NONE" ]] && refresh_ip=true
   else
     touch $POWERLEVEL9K_PUBLIC_IP_FILE && refresh_ip=true
   fi